Well the OP seems specific to me on not having a body but just your brain in a bowl, alive but not really. Just tortured with existence at that point. Even with a robot body, you couldn't feel with it.
A much more realistic method would to be brain transfer into other human bodies that we grow or make synthetically, which we already do with some organs.
I'm not informed enough on how long the brain lasts compared to our aging bodies so maybe its not possible as opposed to some anti-age liquid in a tin can for your brain.